20902515

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1409}}^1$

素因数の和:1483

約数の個数: 32

約数和(自身を含む): 35735040

約数和(自身を除く): 14832525

約数列:

[1, 3, 5, 15, 23, 43, 69, 115, 129, 215, 345, 645, 989, 1409, 2967, 4227, 4945, 7045, 14835, 21135, 32407, 60587, 97221, 162035, 181761, 302935, 486105, 908805, 1393501, 4180503, 6967505, 20902515]

約数ペア:

[(1, 20902515), (3, 6967505), (5, 4180503), (15, 1393501), (23, 908805), (43, 486105), (69, 302935), (115, 181761), (129, 162035), (215, 97221), (345, 60587), (645, 32407), (989, 21135), (1409, 14835), (2967, 7045), (4227, 4945)]